MODIFICATION OF LITHIUM ELECTROLYTE INTERFACE BY PLASMA POLYMERIZATION OF 1,1-DIFLUOROETHENE

Surface of lithium electrodes was covered by an ultra-thin and uniform solid polymer electrolyte layer conductive for lithium ion which was prepared from 1,1-difluoroethene by plasma polymerization. The solid polymer electrolyte showed room temperature conductivity of 3X10(-8) S cm-1. Lithium was deposited (1 C cm-2) on the surface-modified lithium electrode in 1 M LiClO4/propylene carbonate. Scanning electron microscopy observation suggests that dendritic growth of lithium was suppressed on the lithium electrodes surface modified by the ultra-thin solid polymer electrolyte.